package LMR.rbac.service;

import LMR.rbac.Entity.Role;
import LMR.rbac.dto.Roledto;
import LMR.rbac.vo.RoleVo;
import LMR.rbac.vo.Result;

import java.util.Arrays;

public class Roleservice {
    public static int Data_Size=100;
    public static Role[] data=new Role[Data_Size+1];
    public static int idCounter=1;
    public static RoleVo convertToVo(Role role){
        return new RoleVo(role.id, role.name, role.dataScope);
    }
    public static Role createEntity(Roledto dto,int id){
        Role role=new Role(dto.name,dto.dataScope);
        role.id=id;
        return role;
    }
    public static void updateEntity(Role role,Roledto dto){
        role.name=dto.name;
        role.dataScope=dto.dataScope;
    }
    public static  boolean existsById(int id){
        return id>=1&&id<idCounter&&data[id]!=null;
    }
    public static Role findById(int id){
        if (existsById(id)){
            return data[id];
        }
        return null;
    }
    public static Result list(){
        RoleVo[] temp=new RoleVo[Data_Size];
        int length=0;
        for (int i=1;i<idCounter;i++){
            if (data[i]!=null){
                temp[length++]=convertToVo(data[i]);
            }
        }
        return Result.success("查询成功", Arrays.copyOf(temp,length));
    }
    public static Result create(Roledto dto){
        if (idCounter>Data_Size){
            return Result.failure("创建失败，数据已满");
        }
        Role role=createEntity(dto,idCounter++);
        data[role.id]=role;
        return Result.success("创建成功",null);
    }
    public  static Result update(Roledto dto,int id){
        if (!existsById(id)){
            return Result.failure("更新失败，id不存在");
        }
        updateEntity(data[id],dto);
        return Result.success("更新成功",null);
    }
    public static Result delete(int id){
        if (existsById(id)){
            return Result.failure("没有该ID对应的数据");
        }
        if (Userservice.roleInUse(id)){
            return Result.failure("该角色存在用户，不能删除");
        }
        data[id]=null;
        return Result.success("删除成功",null);
    }
}
